William de e



W. DE ROOY.

PNEUMATIC TIRE.

APPLICATION FILED SEPT. 1'0. I918.

Patented May 20 1919 oil ti E.

\VILLIAM DE RGOY, OF NEW YORK, N. Y.

PNEUMATIC TIRE.

mosses.

Specification of Letters Patent.

Patented May 2c, 1919.

Application filed September 10, 1918. 7 Serial No. 253,383.

To all whom. it may concern:

Be it known that IfWuaaan or. Roor, a subject of the Queen of Holland, now residing in the city of New York, borough of Manhattan, county and State of flow York, have invented a certain new and useful Pneumatic Tire, of which the following is a specification. p

This invention is 'a pneumatic tire, and, speaking generally, the objects of the invention are to produce a tire of pronounced durability without employing the customary rubber shoe, and to produce a tire havipg a novel and ellicient non-skid tread.integrally secured to the shoe.

With the foregoing objects in view, the shoe or casing of the tire is composed of a' plurality of plies of leather, secured together in any suitable way, as by rivet-s, and the tread surface of the tire embodies a plurality of metallic members, preferably of steel, provided with cooperating tongues and grooves whereby they are locked against.- lateral displacement, but permit of the necessary ciraunferential movement, somewhat in the nature of links. Each tread member cooperates with an individual metallic attaching plate, po 'tioned bet-ween the plies of leather, the tread members and attaching plates being secured together by tapering pins, which are upset at their inner ends against the inner faces of the attaching plates.

Features of the invention other than those specified, will be a parent from the hereina l'ter detailed description taken in 'con unclion with the accompanying drawings.

la the accompanying drawings, l. have illustrated one practical form of the invention, but the construction shown therein is to be uiulerstood as illustrative, only, and not as defining the limits of the invention.

Figure l is a. transversesection through the tire, showing the securing rivets in cleration; and

Fig. 2 is a fragmentary perspective View of the tread members, attaching plates and securing pins.

Referring to the drawings, 1 designates the rim of the whe l, 2 the pneumatic inner tube, 3 the inner ply. of leather, -'l the intermediate ply of leather and 5 the exterior ply of leather. Positioned intermediate of the inner ply of leather and pneumatic tube 2 is a. layer of canvas 6, The plies or layers of leather are preferably assembled in the par The attaching members 8 are preferably of the shape shown. in Fig. 2, the inner faces 9 thereof being curved to conform to the cou figuration of the tire, the tread 10 being preferably Hat, with curved sides 11 conuecting the outer and inner faces. Each tread member is providld with a groove 12 and a tongue 13, the tongue of one member cooperating with the groove in the adjacent 'member, wiereby the members are locked against lateral movement but have a certain amount of play or flexibility circumferentially of the tire.

Positioned between the inner and intermediate plies'of leather are attaching plates 14, and the tread members are attached thereto by tapering pins 15 which are upset at their inner ends against the inner faces of the attaching plates as clearly appears ,in

1 tire of the construction described can be manufactured at a relatively small cost and is of great durability, not only because of the non-skidding tread members but by reason of the dilferent plies of leather which are successively worn away, 'after the tread members have worn ofi'.

It will be understood that mechanical and formal changes ma be made in the structure described, sum as the substitution. of equivalents, without departing from the spirit or substance of the invention, thescope of which is commensurate with the appended claims; (1. y., one of the inner plies might be composed of rubber or other suitable material. As shown in Fig. 1, the edges of the outer plies. are skived which edges are preferably cemented to the subjacent ply. Moreover, it I is usually desirable to treat the leather plies in one well known wayor all-- other to render them water proof.

llaving described the invention, what claim i. I

1,. As a new article of manufacture, a pneumatie tire embodying an inner rubber tube, a plurality of plies of leather extei'iorly thereof, the successive plies being of progresssively lesser Width from the inside outwardly of the tire, and rivets for securing the lateral edge of each ply through the preceding ply in combination with interfitt ing metallic tread members positioned circumfereritially of the tire, attaching plates interposed between the plies of t1re, and tie members between the plates and the interfitting tread, membersfor holdin the latter in position circumferentially oft e tire.

2. As a new article of manufacture, a pneumatic tire embodying a plurality of plies of leather, metallic plates interposed between the plies, interfitting metallic tread members positioned eircumferentially of the tire, and means connecting the metallic tread members to the plates for holding said tread members in position eircumferentially of the tire.

' In testimony whereof, I have signed my name to this specification.

WILLIAM DE ROOY. 

